Short answer

To maximize impact strength in FFF parts, prioritize optimizing build orientation, raster angle, and infill settings, while carefully controlling nozzle temperature and print speed.

Field: Final Production
Source: The International Journal of Advanced Manufacturing Technology (2026)
Method: Literature Review and Meta-Analysis
Evidence: Strong effect

Adjusting fused filament fabrication (FFF) process parameters significantly influences the impact strength of 3D printed parts by altering their internal structure. This final production research insight is drawn from a 2026 study published in The International Journal of Advanced Manufacturing Technology. Using Literature review and meta-analysis, researchers explored how this design variable affects real-world outcomes. The key design takeaway: To maximize impact strength in FFF parts, prioritize optimizing build orientation, raster angle, and infill settings, while carefully controlling nozzle temperature and print speed.

Study

Final ProductionNew This WeekStrong effect

Optimizing FFF Impact Strength Through Parameter Control

Adjusting fused filament fabrication (FFF) process parameters significantly influences the impact strength of 3D printed parts by altering their internal structure.

The International Journal of Advanced Manufacturing Technology · 2026

Key Findings

01Build orientation, raster angle, and infill density/pattern are primary drivers of impact strength by influencing interlayer adhesion and internal void formation.
02Nozzle temperature and print speed affect material fusion and cooling rates, which in turn impact the strength of the printed layers and their bonds.

Application

Design takeaway

To maximize impact strength in FFF parts, prioritize optimizing build orientation, raster angle, and infill settings, while carefully controlling nozzle temperature and print speed.

How to apply

When designing a part for FFF that requires high impact resistance, consult literature or conduct experiments to determine the optimal combination of build orientation, infill strategy, and extrusion temperature for the chosen material.

Project actions

01When designing a product that needs to withstand impacts, consider how FFF print settings can be adjusted to improve its resilience.
02Document all print parameters used for your prototypes, as they will directly affect their mechanical properties.

Method & Evidence

AimWhat are the critical FFF process parameters that most significantly impact the impact strength of printed parts, and how do they relate to the resulting micro and mesostructure?

MethodLiterature Review and Meta-Analysis

ProcedureThe study systematically reviewed existing research on FFF, analyzing the reported effects of various print parameters (build orientation, raster angle, shell thickness, infill density/pattern, layer thickness, nozzle temperature, print speed) on impact strength. Trends were correlated with observed changes in material microstructure.

ContextAdditive Manufacturing (Fused Filament Fabrication)

Variables

IV["Build orientation","Raster angle","Infill density","Infill pattern","Nozzle temperature","Print speed"]

DV["Impact strength"]

CV["Material filament type","Layer thickness","Nozzle diameter","Ambient temperature"]

Strengths & Limitations

Strengths

+Comprehensive review of a wide range of critical parameters.
+Connects print parameters to underlying microstructural changes.

Limitations

The specific impact strength achieved will depend heavily on the type of plastic filament used and the capabilities of the specific 3D printer.

Reliability & validity

The validity of the findings is strengthened by the review of multiple studies, but direct comparison is limited by variations in testing methodologies. Reliability of individual parameter effects is generally considered moderate to strong, but the combined effect is complex.

Think critically

Given the complexity and interdependencies of FFF print parameters, how can designers develop a systematic approach to optimize for multiple performance criteria simultaneously, rather than just impact strength?

Design Principles

"Material performance in additive manufacturing is a direct function of process parameter control and resulting microstructural characteristics."

Understanding the relationship between print parameters and mechanical properties like impact strength is crucial for designers and engineers selecting additive manufacturing for functional components. This knowledge allows for the targeted design of parts that can withstand dynamic loads, expanding the application range of FFF technology.

What This Means for Your Design

How you print a 3D object using FFF changes how strong it is when it gets hit. Changing things like the direction it's printed, how much material is inside, and the temperature can make it much tougher.

How to use in your project

1.Reference this study when discussing how your chosen print parameters for a prototype influenced its impact resistance, or when justifying parameter choices for improved performance.

Add to My Project

Quick Cite

Paragraph starter

The mechanical performance of FFF-produced components, particularly their impact strength, is highly sensitive to process parameters. Research indicates that adjustments to build orientation, raster angle, and infill strategy can significantly enhance a part's ability to withstand dynamic loading by influencing interlayer adhesion and internal structural integrity. Therefore, careful consideration and optimization of these printing variables are essential when designing for applications requiring robust impact resistance.

Source

The International Journal of Advanced Manufacturing Technology

The role of FFF process parameters on impact strength: a review

journal · 2026

View source

Questions About This Research

What does the research say about optimizing fff impact strength through parameter control?: To maximize impact strength in FFF parts, prioritize optimizing build orientation, raster angle, and infill settings, while carefully controlling nozzle temperature and print speed. Evidence: The International Journal of Advanced Manufacturing Technology (2026).
Why does "Optimizing FFF Impact Strength Through Parameter Control" matter for design?: Understanding the relationship between print parameters and mechanical properties like impact strength is crucial for designers and engineers selecting additive manufacturing for functional components. This knowledge allows for the targeted design of parts that can withstand dynamic loads, expanding the application range of FFF technology.
How can designers apply this research?: To maximize impact strength in FFF parts, prioritize optimizing build orientation, raster angle, and infill settings, while carefully controlling nozzle temperature and print speed.
What were the main findings?: Build orientation, raster angle, and infill density/pattern are primary drivers of impact strength by influencing interlayer adhesion and internal void formation.. Nozzle temperature and print speed affect material fusion and cooling rates, which in turn impact the strength of the printed layers and their bonds.
What research method was used?: Literature Review and Meta-Analysis.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2026 journal from The International Journal of Advanced Manufacturing Technology.
What should I do differently in my next project?: When designing a part for FFF that requires high impact resistance, consult literature or conduct experiments to determine the optimal combination of build orientation, infill strategy, and extrusion temperature for the chosen material.
What are the limitations?: Lack of standardization in testing methods across studies makes direct quantitative comparisons challenging. Interdependencies between parameters can lead to complex optimization landscapes.